import axios from "axios";
import qs from "qs";
import { Notification, MessageBox, Message } from "element-ui";
import store from "@/store";
import { getToken, getAccount } from "@/utils/auth";
import errorCode from "@/utils/errorCode";
import { tansParams } from "@/utils/ruoyi";

// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: process.env.VUE_APP_BASE_API,
  // 超时
  timeout: 10000,

  transformRequest: [
    (data, headers) => {
      /**
       * 说明要上传文件的时候
       */

      if (headers["Content-Type"] === "multipart/form-data") {
        return data;
      }

      /**
       * 需要转成JSON的形式，Spring MVC才能从RequestBody中反序列化对象
       */
      if (headers["Content-Type"] === "application/json") {
        return JSON.stringify(data);
      }
      /**
       * FormData的时候，需要转化数据
       */
      return qs.stringify(data);
    }
  ]
});

const whiteURIList = ["/index/login/config", "/index/login/login"];

// request拦截器
service.interceptors.request.use(
  config => {
    if (whiteURIList.every(x => x.lastIndexOf(config.url) < 0)) {
      config.params = {
        ...(config.params || {}),
        token: getToken(),
        account: getAccount()
      };
    }

    return config;
  },
  error => {
    Promise.reject(error);
  }
);

// 响应拦截器
service.interceptors.response.use(
  res => {
    // 未设置状态码则默认成功状态
    const code = res.data.code;
    // 获取错误信息
    const msg = errorCode[code] || res.data.msg || errorCode["default"];
    if (code === 401) {
      MessageBox.confirm(
        "登录状态已过期，您可以继续留在该页面，或者重新登录",
        "系统提示",
        {
          confirmButtonText: "重新登录",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).then(() => {
        store.dispatch("LogOut").then(() => {
          location.reload(); // 为了重新实例化vue-router对象 避免bug
        });
      });
    } else if (code === 500) {
      Message({
        message: msg,
        type: "error"
      });
      return Promise.reject(new Error(msg));
    } else if (code == -2) {
      //登录过期
      Notification.error({
        title: msg
      });
      store.dispatch("LogOut").then(() => {
        location.reload(); // 为了重新实例化vue-router对象 避免bug
      });
    } else if (code != 0) {
      Notification.error({
        title: msg
      });
      return Promise.reject("error");
    } else {
      return res.data;
    }
  },
  error => {
    //调到登录页面去
    if (error.response && error.response.status === 401) {
      Message({
        message: "当前登录已过期，请重新登录!",
        type: "error",
        duration: 5 * 1000
      });
      store.dispatch("LogOut").then(() => {
        location.reload(); // 为了重新实例化vue-router对象 避免bug
      });
    }
    let { message } = error;
    if (message == "Network Error") {
      message = "后端接口连接异常";
    } else if (message.includes("timeout")) {
      message = "系统接口请求超时";
    } else if (message.includes("Request failed with status code")) {
      message = "系统接口" + message.substr(message.length - 3) + "异常";
    }
    Message({
      message: message,
      type: "error",
      duration: 5 * 1000
    });
    return Promise.reject(error);
  }
);

// 通用下载方法
export function download(url, params, filename) {
  return service
    .post(url, params, {
      transformRequest: [
        params => {
          return tansParams(params);
        }
      ],
      responseType: "blob"
    })
    .then(data => {
      const content = data;
      const blob = new Blob([content]);
      if ("download" in document.createElement("a")) {
        const elink = document.createElement("a");
        elink.download = filename;
        elink.style.display = "none";
        elink.href = URL.createObjectURL(blob);
        document.body.appendChild(elink);
        elink.click();
        URL.revokeObjectURL(elink.href);
        document.body.removeChild(elink);
      } else {
        navigator.msSaveBlob(blob, filename);
      }
    })
    .catch(r => {
      console.error(r);
    });
}

export default service;
